The 1 st , 2 nd and the 3 rd ionization enthalpies, I 1 , I 2 and I 3 , of four atoms with atomic numbers n , n + 1 , n + 2 , and n + 3 , where n

Question

The 1 st , 2 nd and the 3 rd ionization enthalpies, I 1 , I 2 and I 3 , of four atoms with atomic numbers n , n + 1 , n + 2 , and n + 3 , where n < 10 , are tabulated below. What is the value of n ? Atomic number Ionization Enthalpy (kJ/mol) I 1 I 2 I 3 n 1681 3374 6050 n + 1 2081 3952 6122 n + 2 496 4562 6910 n + 3 738 1451 7733

TestHub · Accepted Answer

From given data ( n + 2 ) atom is alkali metal which is sodium. As n + 2 = 11 So, n = 9

Atomic number	Ionization Enthalpy (kJ/mol)
	$I_{1}$	$I_{2}$	$I_{3}$
$n$	$1681$	$3374$	$6050$
$n + 1$	$2081$	$3952$	$6122$
$n + 2$	$496$	$4562$	$6910$
$n + 3$	$738$	$1451$	$7733$

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